An acute angle triangle with interior angles less than 90 degrees

						var board = JXG.JSXGraph.initBoard('box1', {
boundingbox: [-10, 10, 10, -10],showNavigation: false, showcopyright: false, axis: false,
});

var Inpt = [35,75 ,15,["A","B","C"],'AAS'];
var tri = board.create('triangle',Inpt,{D:"LT",'line':{withLabel:false,strokeColor:'blue',strokeWidth:2}, 'angle':{ strokeColor:'red', strokeWidth:1}});

var a1 = board.create('angle',[tri.A,tri.C,tri.B],{ strokeColor:'red', radius:1.6, strokeWidth:1, name:"70°",label:{offset:[-5,0]}});

var t1 = board.create('text',[-3,-4,'acute triangle'],{color:"blue"});

The image appears in the following posts

  1. A triangle is a polygon with three sides. It is one of the basic shapes in plane geometry. Before we find out the types of triangles, let's look at how to construct a triangle.

    The elements of a triangle

    One of ways to construct a triangle is by 3 separate points. A triangle can be made by simply joining the 3 points. In the meantime, the basic elements of the triangle are also constructed.

    Vertices: the original 3 points which construct the triangle are the vertices of the triangle. They are endpoints of 3 sides. If a triangle is made by 3 given lines, the intersection points of separate two lines construct vertices of the triangle.

    Sides: line segments that join two consecutive vertices and form a closed two-dimensional shape. In a triangle, the sum of the length of two sides is larger than the third side.

    Interior angles: angles that are formed by two consecutive sides at the vertex where they converge. The sum of three interior angles of a triangle is 180°.

Triangle posted 1 year ago

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